Olympus CAMEDIA C-300 ZOOM Manual page 12

When playing back pictures
Power on: Press the
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Power off: Press the
Never open the card cover, remove the card or the batteries, or connect or
disconnect the AC adapter while the camera is turned on. Doing so could
destroy all data on the card. Destroyed data cannot be restored. When
changing the card, be sure to turn the camera off before opening the card
cover.
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(monitor) button with the lens barrier closed.
The camera turns on in the playback mode. The monitor turns
on and the last picture taken is displayed.
(monitor) button.
The monitor and the camera turn off.